Radio speaker or horn



Jan, 10, 1928. 1,656,140

c. E. BURK I RADIO SPEAKER OR HORN Filed July 2. 1926 INVENTOR. l azfluriz,

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Patented Jan. 19, 1928.

UNITED STATES PATENT ()FFECE.

CLARENCE E. BURK, OF MARION, OHIO, ASSEGNOR- OE ONE-HALF TO THE VAN ATTA HARDWARE COMPANY, OF MARION, OHIO, A CGRPORATION OF OHIO.

RADIO srnannn on noan.

Application filed July 2, 1928.

This invention relates to a radio speaker or horn, designed primarily for use in connection with radio receiving sets, but it is to be understood that a speaker device, in accordance with this invention, can be employed in any connection for which it is found applicable, and the invention has for its object to provide, in a manner as hereinafter set forth a long column speaker formed 2 throughout of wood of a non-resonant type for reproducing the bass or deep notes approximately the same as the true tone there of.

A further object of the invention is to provide, in a manner as hereinafter set forth, a radio speaker or horn device including a structure formed throughout of non-resonant wood to provide a coiled column or tone chamber gradually increasing in diameter from its intake to its outlet for reproducing a sound received by and transmitted from a receiving set in a tone approximately the same as when originally broadcasted.

Further objects of the invention are to provide a radio speaker or horn, in a manner as hereinafter set forth, which is simple in its construction and arrangement, strong, durable, compact, thoroughly efficient 1n 1t-s use, and comparatively inexpensive to manufacture.

With the foregoing and other objects in view, the invent-ion consists of the novel construction, combination and arrangement of parts as hereinafter more specifically de scribed, and illustrated in the accompanying drawings wherein is shown an embodiment of the invention, but it is to be understood that changes, variations and modifications can be resorted to which fall within taken between the longitudinal median and the other side of the device.

Figure 3 is a horizontal sectional view on line 3-3 Figure 1. V

Figure 4 is a section on line 4-4, Figure 3. Referring to the drawings in detail 1 denotes a rectangular base board or member her 1.

Serial No. 120,138.

of the desired width and length. The base board 1 is constructed of wood of a nonresonant type and the other elements of the device are also constructed of the same material. As to wood of a non-resonant type, any wood possesses such a characteristic if it is of a thickness of a half inch or more, preferably the wood employed should be five-eighths of an inch in thickness. Secured upon the upper face of the member 1 at each end thereof is a radius block and the said blocks are indicated at 2, 3. The length of the block 2 is the same as the width of the member 1 and the outer side edge of the block 2 is flush with an end edge of the member 1. The end edges of the block 2 are flush with the side edges of the mem- The block 2 has its inner side formed with a concave cutout portion having the wall l thereof extend upon an arc throughout.

The block 3 has its outer side edge flush with the other end edge of the member 1 and said block 3 has its end edges 5, 6 disposed at an inclination and extending in opposite directions with respect to each other. The block 3 gradually increased in length from its outer side edge towards its inner side edge. The end edge 6 of the block 3 is spaced from a side edge of the member 1, but positioned in close proximity therewith. The end edge 5 of the block 3 is positioned a substantial distance from the other side edge of the member 1 and the distance be tween the end edge 5 of the block 3 and the said side edge of the member 1 is greater than the distance between the end edge 6 of the block 3 and the other side edge of the member 1. The block 3 is of materially less length than the length of the block 2. The inner side of the block 3 is formed with a concave cutout portion having its wall 7 er:- ten'd in the same arc throughout. The concave cutout portions in the blocks 2 and 3 extend from the lower to the upper faces thereof. The block 3 is of materially less width than th width of the block 2. The concave cutout portions of the blocks 2 and 3 are oppositely disposed with respect to each other.

Secured upon the upper face of the member 1, is a radius block 8 of semi-circular contour. The block 8 is eccentrically disposed with respect. to the wall 1 of the concavity formed in the block 2 and the curved till block 3 is a cover member 15 therefor.

edge of the block 8 opposes said wall 4 and owing to the eccentric disposition of the blockS with respect to the wall 4t, a curved sound branch passage 9 is provided which gradually increases 111 area from one end towards the other that is to sa it radual anembers 10 and 11 and said member 10 abuts against the inner side of the block 2 and has its inner face form a continuation ot' the wall '7 of the concavity in the block 3. The wall :lorming.member 11 is positioned a one end centrally oitithe concavity formed in the block 3 and the said end of said member 11 is" flush withthe inner side edge of the block 3. From the block 3 the members 10 and 11 diverge with respect to each other and the outer face of the member 10 forms a continuation of the curved edge of the block8. The outer face of the member 11 forms a continuation of the curved edge of the block 8. The members 10 and 11 are constructed ofpanels standing on edge. Positioned between the memberslO and 11 is vertically disposed wall-forming member 12 which abuts against the squared edge of the block 8-.- The members 10, 11 and 12 extend above the blocks 3 and 8 and are of the same height. Secured between the members 10 and 11 is a horizontallydisposed upwardly extending inclined wall-"forming member 13. r h I p The block 2 is the same height the block 8, but the block 3 is of greater height than the blocks 2 and 3. Mounted upon the blocks 2 and S is'aicover member 14 which is common thereto. Mounted on the cured to the member 1 and abutting against the innersidcs of'the blocks 2 and 3 at the outer cnds. thereof is a vertically disposed wall-l orining member 16 which gradually increases in height tronrthe block 2 towards the block i 3. 'Abutling against the cover members 1st, 15, as well asthe wall torming men'iberjll and seated on the member 16 is a. wall-forming member 17 which inclines from the cover 14. to the cover 1.5 in an up ward direction. 7 V

Secured upon the upper face of the member 1 and extending from the block 2 further opposing and spaced from the end 5 of the block 3 is a walhformin; member 18 of materially less height than the height of the block 3 and which gradually increases in height towards the block 2. Tee member 18 opposes the member and is inclined away therefrom in a direction towards'the block 2. Mounted on the member 18 and abutting at one end against the cover membranch passage 24.

and form a sound conducting column and . eeeaao member 12 forms a continuation'ot' the up per face 01 the block 20 see Figure 2. s

, The base member 1. in connection with one end of the'block 3, and the wall torming members 1.0, 18 and 1%) term a branch sound passage 22 which gunluall increases in area from its intake towards its outlet and the outlet of the branch 22 opens into the intake of the branch 9. The base member 1 in connection with the walhtorming members 11. 16 and 1? form a sound branch passage 23 which gradually increases in area from its intake towards its outlet. The outlet of the sound branch passage 9 opens into. the intake oi"- the passage 23 and the outlet of the latter opens into the concavity formed in the block 3 and which provides a sound The wall-forming members 10, 11, 12 and 13 and block 21 in connection with the base member 1 provides a sound branch passage25 which gradually increases in area from its intake towards its outlet. The passage 2% communicates with the intake in the passage 25 and the outlet. of the latter opens into a vertically disposed flaring hell or nozzle 26 which is securedto and seated on the wall-forming members 10, 11. 12 and 13. The outer faces of the sides and one end of the bell 26 term a continuation oi": the outer faces of the wall forming members 10, Hand 12. The lower The sound branch passa es is, a. 2:3. tone chamber which gradually ii'lcreases in area from its intake towards its out-let end and is ot'coiled contour. said column or tone chamber is arranged to one side of the out-take thereof. The sound waves travel in a circuitous direction and gradually expands from the intake to the outlet of said column and the direct-ion in whichthe sound waves travel is indicated by the arrows in Figure 3. V

Secured to the intake end of the sound conducting column or tone chambeiyas well as communicating with said intake end, is a phone unit 27 leading from a radio receiving set, not shown.

The sound conducting The upper edge of The intake for column or tone Q or V chamber formed by the sound branch passages, is so set up that the sound waves enter in a direction at right angles to the direction in which the sound waves pass from said column or chamber into the bell 26. As the device is constructed of nonresonant wood throughout the reproductions of the sound is not marred in any manner and owing to the manner in which the sound conducting column or tone chamber is arranged it will reproduce the bass or deep, notes approximately the same as the true tone thereof or in other words the sound received by the column or tone chamber will be produced approximately the same as When initially broadcast, therefore it is thought that the many advantages of a radio speaker device or horn, in accordance with this invention, can be readily understood, and although the preferred embodiment of the invention is as illustrated and described, yet it is to be understood that changes in the details of construction can be had which will fall within the scope of the invention as claimed.

length than the other, one of said side portions being of greater length than the other, said intake positioned at one end of the side portion of greater length and said outlet at one end of said intermediate portion and disposed vertically, and a vertically disposed fiaring bell communicating at its lower end with said outlet, and a radius block positioned against the bottom and an end wall of said intermediate portion at the outlet end thereof and formed with a curved upper it face leading from the bottom to said end wall.

In testimony whereof, I afix my signature hereto.

CLARENCE E. BURK. 

